diff --git a/config.h.in b/config.h.in
index 9cc487cbe..52d4f7eb0 100755
--- a/config.h.in
+++ b/config.h.in
@@ -4,6 +4,17 @@
 #ifndef CT_CONFIG_H
 #define CT_CONFIG_H
 
+//---------------------------- Version Flags ------------------//
+// Cantera version -> this will be a double-quoted string value
+//                    refering to branch number within svn
+#undef CANTERA_VERSION
+
+// Integer for major number of Cantera
+#define CANTERA_VERSION_MAJORNUMBER  18
+// Flag indicating it's part of major version 18
+#define CANTERA_VERSION_18       1
+//  Flag indicating it's a development version
+#define CANTERA_VERSION_18_XXX   1
 
 //------------------------ Development flags ------------------//
 //